PQC Migration (Post-Quantum Cryptography Migration)

PQC migration is the multi-year program by which operators, standards bodies and vendors replace RSA/ECDH/ECDSA in TLS, IPsec, X.509 PKIs, N32/PRINS, SUCI encryption and lawful-interception key material with NIST-standardized PQC algorithms (ML-KEM, ML-DSA, SLH-DSA), typically via hybrid schemes first. GSMA PQ.03 and 3GPP SA3 track requirements for telecom-specific interfaces.

Categories: SignalingRoaming and InterconnectIdentity and Subscriber

PQC Migration in context

Signaling protocols carry the control-plane instructions that set up calls, register subscribers, hand over sessions and route SMS. SS7, Diameter, GTP-C and SIP are the four dominant families, and interconnect exposure of any of them is treated by GSMA FS.11 / FS.19 / FS.20 as a top-tier telecom risk.

Roaming and interconnect are where two operators, often with an IPX or GRX carrier in between, exchange signaling and user-plane traffic. Trust boundaries here are the primary attack surface for location tracking, SMS interception and fraud, which is why GSMA now mandates SEPP with PRINS on 5G interconnect.

To place PQC Migration in the wider telecom-security picture, review Roaming, Roaming Security Assessment, SS7, TCAP Abuse, X.509 and Tabletop Exercise.

Related terms

Related topic hubs

  • 5G Security 5G SBA, SEPP, SUCI, 5G-AKA, N32 and service-based interface security.
  • SEPP Security N32-c/N32-f, PRINS, JWE and OAuth 2.0 at the 5G roaming edge.
  • Roaming Security IPX/GRX interconnect risk, home-routed vs local-breakout, SEPP.
  • Signaling Firewall Unified SS7/Diameter/GTP/SMS signaling firewall framework.

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